Punch



Patented lan. I7, |899.. J. L. BALTZER.

P U N C H (Application f led Oct. 21, 1897.)

(No Model.)

WITNESEEE:

NrTn STATES PATENT CFFICE.

JOHN L. BALTZER, OF CHELSEA, MASSACHUSETTS.

PUNCH.

SPECIFICATION forming part of Letters Patent No. 618,022, dated January 1*?, 1899. Application filed October Z1, 1897. Serial No. 655,901. (No model.)

To rtl/Z whom it 71mg/ concern.:

Be it known that I, JOHN L. BALTZER, of Chelsea, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Punches, of which the following is a specification.

This invention relates to punches in which an arm or holder provided with a cutting-bed is combined with a pivoted lever carrying a punch arranged to be moved toward and from the bed and to cooperate with the latter in punching or cutting ahole in a piece ofleather or other material interposed between the bed and punch, the said arm or holder being preferably extended to form a lever so arranged relatively to the punch-lever as that both levers can be held in one hand and operated thereby.

The invention has for its object to enable a series of punches to be carried by the punch- 4lever and adj usted thereon so as to be used interchangeably, each punch being locked in its operative position.

The invention also has for its object to provide simple and efcient means for giving the cutting or punching die an easy rectilinear movement toward and from the bed.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure l represents a side elevation of a punch embodying my invention, the cutting tool or die and bed being separated. Fig. 2 represents a view similar to Fig. l, showing the cutting-die in contact with the bed. Fig. 3 represents a section on line 3 3 of Fig. l. Fig. 4 represents an elevation of the opposite side from that shown in Figs. l and 2. Fig. 5 represents an end View. Fig. 6 represents a section on line 6 G of Fig. a. Fig. 7 represents a section on line 7 7 of Fig. 6. Fig. S representsa section on line 8 S of Fig. (i. Fig. i) represents a side view of the turret detached. Fig. lO represents a sectional view of the turret. Fig. 11 represents a sectional View of the turret and the stud on which it is mounted, taken on the plane of line 3 3 of Fig. l, the latch being displaced to unlock the turret. Fig. l2 represents a side view of the stud detached. Fig. 13 represents an end view of the stud detached.

The same letters and numerals of reference indicate the same parts in all the figures.

In the drawings, d. represents the cuttingbed,` which is made of a suitable relativelysoft metal or alloy, such as brass.

a' represents the arm or holder to which the bed is afixed, said arm being preferably provided with a lever or handle CL2, the arm and handle being here shown as of the form usually employed in hand-punches.

a3 represents an arm formed on or rigidly afiixed to the arm a' and provided With parallel ribs a4 c4, forming a guide which is fixed relatively to the bed and is arranged todirect the movements of the punchcarrier,here inafter described, toward and from the bed.

b represents a slide or punch-carrier which is movable between the ribs a* and is provided with a stud o, which projects laterally from the slide over the bed ct. The stud is preferably secured to the slide by the following means: The stud has a squared portion 4., which fits closely in a square orifice in the slide b and projects through and is movable in an elongated slot a5 formed in the arm a3 between the ribs a4 a4. The stud has a shoulder 6, which bears on one side of the slide, and a reduced threaded outer portion 7, which projects from the arm o3 and has a nut o', bearing on a shoulder 8 at the outer end of the squared portion 4. The inner end of the stud has a head 9, in which is formed a transverse slot 10, the purpose of which will be presently described.

d represents a punch-carrying turret, which is preferably of circular form and has a series of radially-arran ged punches d' d/ cl d ot' different sizes. The said turret is recessed at one side and is partly closed at one end to form an orifice d2, formed to receive the portion of the stud adjoining the head 9, said orice being of smaller diameter than the head, so that the latter bears upon the portion of the turret surrounding the orifice d2 and connes the turret against the operating-lever e, presently described.

d3 (Z3 d3 d3 represent a series of notches formed in the portion of the turret which forms the wall of the oriice d2, said notches corresponding in number and position to the punches, for a purpose presently described.

e represents the operating-lever, which is pivoted at e to the bed-carrying arm a' and IOO comprises the two arms 2 S, the arm 2 having a slot c2, through which the stud c passes. The walls of said slot bear on the stud, so that the stud is moved by the lever, together with the slide b and punch-turret CZ, toward and from the bed c when the lever c is operated. The arm 3. is so arranged relatively to the lever or handle d2 that the two can be held and manipulated by one hand, as usual in hand-punches, a spring f attached to the lever c, normally forcing the two levers apart.

g represents a lookin g device or latch which is formed to enter the slot IO in the head of the stud and is yieldingly held in said slot by a spring g', located in a longitudinal cavity in the stud and bearing at one end on the inner end of said cavity and at its other end on the head of a pin g2, attached, by a screw-thread connection or otherwise, to the latch g and extending through the stud, the pin being adapted to be pressed inwardly to force the latch g outwardly. The ends of the latch are formed to engage'two of the notches cl3 in the turret, the arrangement being such that when the latch is held by the spring g in the slot IO -its ends are also heldin engagement with two of said notches, so that the turret is locked to the stud; but when the V latch is forced outwardly, as shown in Fig.

l1, it leaves said notches and releases the turret. When the turret is thus locked, one of its punches is in position to cooperate with the bed ct,- and when it is desired to bring another punch into operative position the pin g2 is pushed inwardly, thus disengaging the latch from the turret, 4whereupon the turret may be turned upon the stud until the desired punch reaches its operative position;

when the latch springs back into the slot lO, its ends again engaging notches in the turret and locking it. It will be seen, therefore, that the turret may be locked in as many positions as there are notches, and as there is a punch for every notch provision is made for securely holding each punch in its operative position.

When the levers are forced toward each other, the arm 2 moves the operative punch toward the bed ct, and when the levers are released the spring fseparates-the punch from the bed.

` The slot e2 in the operating-lever is preferably curved or cam-shaped, its curvature being such that when the arm is being moved to operate the punch the point of contact of the wall of the slot with the stud will be directly over the center of the stud, so that the pressure will be directly toward the bed, and the frictional resistance reduced to the minimum. The portion of the stud that passes through the slot e2is preferably provided with an antifriction-roll 7', which rotates loosely on the stud and rolls on the wall of the slot.

I do not limit myself to the details of construction above described, as the same may be variously modified without departing from the spirit of my invention.

Myimprovements may be applied to powerpunches, the arm cl.' being fixed and the arm 2 moved by power applied in any suitable manner.

The guide c4 a4, xed relatively to the bed a, and the slide b, movable in said guide` constitute a simple and efficient means for giving the punch a rectilinear movement toward the bed. These parts may therefore be used in connection with a punch engaged with the slide in any suitable way andA are not limited to use in connection with a turret and a plurality of punches.

l. A punch comprising an arm or holder having a bed, a guide fixed relatively to said bed, a slide movable in said guide toward and from the bed, a stud affixed to said slide, -a

movable locking member on the stud, a turret rotatable on said stud and provided with a plurality of punches and with a plurality of locking members to engage the locking member on the stud, and a pivoted operatinglever engaged with the stud and adapted to move the stud, slide, and turret toward and from the bed.

2. A punch comprising an arm or holder having a bed, a guide fixed relatively to the bed, a slide movable in said guide toward and from the bed, a stud affixed to the slide, a latch movable in the stud and having a springcontrolled operating-pin extending through the stud, a punch-carrying turret rotatable on the stud and having a series of notches arranged to engage said latch, and a pivoted operating-lever having means for moving the slide and turret.

3. A hand-punch comprising an arm or holder having a bed, a guide xed relatively to the bed, and a lever or handle, said parts being rigidly connected; a slide movable in said guide toward and from the bed, a punchturret rotatably connected with the slide and provided with a plurality of punches, means for locking the turret to the slide in different IOO IIO

positions, and an operating-lever pivoted to said lever or handle and having'means for moving the slide and turrret.

4. A hand-punch comprising an arm or holder having a bed, a guide fixed relatively to the bed, and a lever or handle, said parts being Arigidly connected; a slide movable in said guide toward and from the bed, a stud affixed to the slide, a punch-turret on the stud and provided with a plurality of punches,

means for locking the turret, and a pivoted operating-lever having a slot embracing the stud, said operating-lever being adapted to impart motion to the stud, slide, and turret. In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 13th day of October, A. D. 1897.

JOHN L. BALTZER. Witnesses:

THOMAS E. CHERRY, C. F. BROWN. 

